EP4460725B1 - Elektrophoretische medien mit elektrophoretischen partikeln und einer kombination von ladungssteuermitteln - Google Patents

Elektrophoretische medien mit elektrophoretischen partikeln und einer kombination von ladungssteuermitteln

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Publication number
EP4460725B1
EP4460725B1 EP22854627.1A EP22854627A EP4460725B1 EP 4460725 B1 EP4460725 B1 EP 4460725B1 EP 22854627 A EP22854627 A EP 22854627A EP 4460725 B1 EP4460725 B1 EP 4460725B1
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EP
European Patent Office
Prior art keywords
particles
type
electrophoretic
color
group
Prior art date
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Active
Application number
EP22854627.1A
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English (en)
French (fr)
Other versions
EP4460725A1 (de
Inventor
Lee Yezek
Stephen J. Telfer
Sherry Hsin-Yi Tsai
Ziyan Wu
Eugene Bzowej
Ali Sarvi
Craig R. Gibeau
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E Ink Corp
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E Ink Corp
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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/0009—Materials therefor
    • G02F1/0018—Electro-optical materials
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/1676—Electrodes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/1679—Gaskets; Spacers; Sealing of cells; Filling or closing of cells
    • G02F1/1681—Gaskets; Spacers; Sealing of cells; Filling or closing of cells having two or more microcells partitioned by walls, e.g. of microcup type
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F2001/1678—Constructional details characterised by the composition or particle type

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Claims (11)

  1. Elektrophoretisches Medium umfassend:
    ein nichtpolares Fluid (27);
    einen ersten Typ von Partikeln, der einen ersten Typ von Pigment umfasst, wobei der erste Typ von Pigment anorganisch ist und eine erste Farbe aufweist, wobei der erste Typ von Partikeln eine erste Ladungspolarität aufweist;
    einen zweiten Typ von Partikeln, der einen zweiten Typ von Pigment umfasst, wobei der zweite Typ von Pigment eine zweite Farbe aufweist, wobei die zweite Farbe von der ersten Farbe verschieden ist, wobei der zweite Typ von Partikeln eine zweite Ladungspolarität aufweist, wobei die zweite Ladungspolarität der ersten Ladungspolarität entgegengesetzt ist;
    einen dritten Typ von Partikeln, der einen dritten Typ von Pigment mit einer dritten Farbe umfasst, wobei die dritte Farbe von der ersten und der zweiten Farbe verschieden ist, wobei der dritte Typ von Partikeln die zweite Ladungspolarität aufweist; und
    einen vierten Typ von Partikeln, der einen vierten Typ von Pigment mit einer vierten Farbe umfasst, wobei die vierte Farbe von der ersten, der zweiten und der dritten Farbe verschieden ist, wobei der vierte Typ von Partikeln die erste Ladungspolarität oder die zweite Ladungspolarität aufweist;
    ein erstes Ladungssteuermittel mit einer molekularen Struktur, wobei die molekulare Struktur des ersten Ladungssteuermittels wenigstens eine quartäre Ammoniumgruppe und einen nichtpolaren Schwanz aufweist; und
    ein zweites Ladungssteuermittel mit einer molekularen Struktur, wobei die molekulare Struktur des zweiten Ladungssteuermittels zwei oder mehr polare Gruppen und einen nichtpolaren Schwanz aufweist, wobei die zwei oder mehr polaren Gruppen ausgewählt sind aus der Gruppe bestehend aus Aminogruppe, Sulfonatgruppe, Sulfatgruppe, Sulfinatgruppe, Carbonsäuregruppe, Phosphonsäuregruppe, Phosphinatgruppe, Phosphatgruppe, Hydroxygruppe, Thiolgruppe, alpha-Diketongruppe, beta-Diketongruppe, Ethylenoxidgruppe und Propylenoxidgruppe, wobei der nichtpolare Schwanz eine polymere Gruppe umfasst, wobei die polymere Gruppe von einem Monomer gebildet wird, das eine Alkyl- oder Alkenylgruppe mit wenigstens zehn Kohlenstoffatomen umfasst; und
    einen wasserlöslichen Ether, wobei der wasserlösliche Ether ein Molekulargewicht von 75 bis 5.000 Dalton aufweist.
  2. Elektrophoretisches Medium nach Anspruch 1, wobei die molekulare Struktur des Monomers, das zum Bilden der polymeren Gruppe des nichtpolaren Endes des zweiten Ladungssteuermittels verwendet wird, eine Carbonsäure, ein Carbonsäureanhydrid oder ein Carbonsäurehalogenid enthält, wobei die Carbonsäure und das Carbonsäurehalogenid von 10 bis 22 Kohlenstoffatome umfassen und wobei das Carbonsäureanhydrid von 20 bis 44 Kohlenstoffatome umfasst.
  3. Elektrophoretisches Medium nach Anspruch 2, wobei die molekulare Struktur des Monomers, das den polymeren Schwanz des zweiten Ladungssteuermittels bildet, ferner eine Hydroxygruppe oder eine Amingruppe umfasst.
  4. Elektrophoretisches Medium nach Anspruch 1, wobei das Monomer, das zum Bilden des polymeren Schwanzes des zweiten Ladungssteuermittels verwendet wird, ausgewählt ist aus der Gruppe bestehend aus Ricinolsäure, Linolsäure, Ölsäure, Linolsäure, Säurehalogenid von Ricinolsäure, Säurehalogenid von Linolsäure, Säurehalogenid von Linolensäure, Ricinolsäureanhydrid, Linolsäureanhydrid, Ölsäureanhydrid und Linolensäureanhydrid.
  5. Elektrophoretisches Medium nach Anspruch 1, wobei die molekulare Struktur des zweiten Ladungssteuermittels ein Kammpolymer mit Alkyl- oder Alkenylverzweigungen und zwei endständigen polaren funktionellen Gruppen aufweist.
  6. Elektrophoretisches Medium nach Anspruch 1, wobei der erste, zweite, dritte und vierte Typ von Partikeln eine Polymerschicht aufweist, wobei das Polymer komplexiert, adsorbiert oder kovalent an den ersten, zweiten, dritten und vierten Typ von Pigmenten gebunden ist.
  7. Elektrophoretisches Medium nach Anspruch 6, wobei der zweite und der vierte Typ von Partikeln ein Polymer umfasst, das von Methylmethacrylat und einem Monomer, das Dimethylsiloxan umfasst, gebildet wird.
  8. Elektrophoretisches Medium nach Anspruch 6, wobei der dritte Typ von Partikeln durch eine Behandlung von Pigmentpartikeln (a) mit Methylmethacrylat und einem Dimethylsiloxan umfassenden Monomer oder (b) mit Vinylbenzylchlorid und einem Acrylat- oder Methacrylatmonomer gebildet ist.
  9. Elektrophoretisches Medium nach Anspruch 1, wobei die Polaritäten des zweiten, dritten und vierten Typs von Partikeln alle positiv sind, wobei der zweite Typ von Partikeln ein zweites Zeta-Potential aufweist, wobei der dritte Typ von Partikeln ein drittes Zeta-Potential aufweist, wobei der vierte Typ von Partikeln ein viertes Zeta-Potential aufweist, wobei das zweite Zeta-Potential größer als das dritte Zeta-Potential ist und wobei das vierte Zeta-Potential kleiner als das dritte Zeta-Potential ist.
  10. Elektrophoretisches Medium nach Anspruch 1, wobei die erste Farbe weiß ist, die zweite Farbe cyan ist, die dritte Farbe magenta ist und die vierte Farbe gelb ist.
  11. Elektrophoretische Farbanzeige umfassend:
    eine erste lichtdurchlässige erste Elektrodenschicht (21) an einer Betrachtungsoberfläche (23);
    eine zweite Elektrodenschicht (22), die ein Array von Dünnfilmtransistoren aufweist, die an Pixelelektroden (25) gekoppelt sind; und
    eine elektrooptische Materialschicht umfassend das elektrophoretische Medium nach Anspruch 1, wobei die elektrooptische Materialschicht zwischen der ersten lichtdurchlässigen Elektrodenschicht (21) und der zweiten Elektrodenschicht (22) angeordnet ist.
EP22854627.1A 2022-01-04 2022-12-28 Elektrophoretische medien mit elektrophoretischen partikeln und einer kombination von ladungssteuermitteln Active EP4460725B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202263296179P 2022-01-04 2022-01-04
PCT/US2022/054136 WO2023132958A1 (en) 2022-01-04 2022-12-28 Electrophoretic media comprising electrophoretic particles and a combination of charge control agents

Publications (2)

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EP4460725A1 EP4460725A1 (de) 2024-11-13
EP4460725B1 true EP4460725B1 (de) 2026-07-29

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Country Link
US (1) US12699288B2 (de)
EP (1) EP4460725B1 (de)
JP (2) JP7751744B2 (de)
KR (2) KR20250150151A (de)
CN (1) CN118451364A (de)
TW (1) TWI849669B (de)
WO (1) WO2023132958A1 (de)

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WO2025239462A1 (ko) * 2024-05-13 2025-11-20 엘지전자 주식회사 반사형 컬러 변환모듈 및 이를 포함하는 가전기기

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